SHOCKING: The graphic video of James Foley being killed went viral [AP]

The 26-year-old American woman was reportedly kidnapped while on a humanitarian mission in Syria last year.

US government officials and her family have requested that she not be named in fears for her safety.

Last week, Foley, 40, was seen being beheaded in a barbaric video that spread across the internet.

Killer 'Jihadi John', believed to be from the UK, was later seen grasping reporter Steven Sotloff's head at the end of the video, telling the world he would be next if America did not meet his demands.

The five-minute video created uproar around the globe with many disgusted at the horrifying clip.

REMEMBRANCE: A special mass was held for James Foley today [AP]

“We would like to state that our family does not have any connections to such groups or actions.”

The Pentagon received a £60million ransom before Foley's death but will now be extra careful to ensure latest demands are met.

Muslim extremists IS, formerly known as ISIS, have also asked for the release of Aafia Siddiqui, a neuroscientist who was convicted of plotting to Americans in 2010.

American officials believe she has worked with al-Qaida.

Following the latest demands, her family of Siddiqui blasted the ransom and how the group have associated it with their relatives' name.

It reads: “If the issue is true, we would like to state that our family does not have any connections to such groups or actions.

“We believe in a struggle that is peaceful and dignified. Associating Aafia’s name with acts of violence is against everything we are struggling for.”

“While we deeply appreciate the sincere feelings of those who, like us, wish to see the freedom of our beloved Aafia, we cannot agree with a ‘by any means necessary’ approach to Aafia’s freedom.

"Nor can we accept that someone else’s daughter or sister suffer like Aafia is suffering."

FREE: Hostage Peter Curtis is said to have been released on Sunday [GETTY]

The demand follows further American airstrikes on Iraq.

Shells began being dropped on August 8 and the IS claimed it would not stop killing until the strikes are called off.

One hostage, Peter Curtis, was released by al-Nusra Front earlier this week.